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WO2017006607A1 - Dispositif de communication, et procédé de communication - Google Patents

Dispositif de communication, et procédé de communication Download PDF

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Publication number
WO2017006607A1
WO2017006607A1 PCT/JP2016/062163 JP2016062163W WO2017006607A1 WO 2017006607 A1 WO2017006607 A1 WO 2017006607A1 JP 2016062163 W JP2016062163 W JP 2016062163W WO 2017006607 A1 WO2017006607 A1 WO 2017006607A1
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WO
WIPO (PCT)
Prior art keywords
frame
delivery confirmation
communication
frequency
information
Prior art date
Application number
PCT/JP2016/062163
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English (en)
Japanese (ja)
Inventor
裕一 森岡
英佑 酒井
Original Assignee
ソニー株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to JP2017527100A priority Critical patent/JP6834954B2/ja
Priority to EP22213712.7A priority patent/EP4171111B1/fr
Priority to US15/568,860 priority patent/US10361876B2/en
Priority to CN201680038557.1A priority patent/CN107710814B/zh
Priority to CN202110971491.4A priority patent/CN113676307B/zh
Priority to EP20211056.5A priority patent/EP3806533B1/fr
Priority to EP16821078.9A priority patent/EP3322216B1/fr
Priority to KR1020177035577A priority patent/KR102554560B1/ko
Priority to EP24171336.1A priority patent/EP4412159A3/fr
Priority to MYPI2017704233A priority patent/MY182873A/en
Priority to CN202110971940.5A priority patent/CN113676308B/zh
Priority to CA2985322A priority patent/CA2985322C/fr
Application filed by ソニー株式会社 filed Critical ソニー株式会社
Publication of WO2017006607A1 publication Critical patent/WO2017006607A1/fr
Priority to PH12018500032A priority patent/PH12018500032A1/en
Priority to US16/429,164 priority patent/US10887121B2/en
Priority to US17/137,378 priority patent/US11362850B2/en
Priority to US17/752,882 priority patent/US11799681B2/en
Priority to US18/198,847 priority patent/US12068878B2/en
Priority to US18/766,719 priority patent/US20240364557A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H04L1/1685—Details of the supervisory signal the supervisory signal being transmitted in response to a specific request, e.g. to a polling signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1864—ARQ related signaling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/16—Arrangements for providing special services to substations
    • H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
    • H04L12/1863—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast comprising mechanisms for improved reliability, e.g. status reports
    • H04L12/1868—Measures taken after transmission, e.g. acknowledgments
    • H04L12/1872—Measures taken after transmission, e.g. acknowledgments avoiding ACK or NACK implosion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/16—Arrangements for providing special services to substations
    • H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
    • H04L12/1886—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast with traffic restrictions for efficiency improvement, e.g. involving subnets or subdomains
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/04—Error control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/16—Arrangements for providing special services to substations
    • H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
    • H04L12/189—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast in combination with wireless systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/54—Store-and-forward switching systems 
    • H04L12/56—Packet switching systems
    • H04L12/5601—Transfer mode dependent, e.g. ATM
    • H04L2012/5638—Services, e.g. multimedia, GOS, QOS
    • H04L2012/564—Connection-oriented
    • H04L2012/5642—Multicast/broadcast/point-multipoint, e.g. VOD
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present disclosure relates to a communication device and a communication method.
  • wireless LAN Local Area Network
  • IEEE Institute of Electrical and Electronics Engineers 802.11
  • ACK Acknowledgement
  • BA Block ACK
  • Patent Document 1 After a multicast frame is transmitted to each terminal, transmission of a BAR (Block ACK Request) frame indicating a BA frame transmission request and reception of a BA frame as a response to the BAR frame are performed.
  • BAR Block ACK Request
  • An invention relating to a wireless communication device that performs each in time order is disclosed.
  • the wireless communication resource for confirming delivery of a multicast frame is allocated in time series for each terminal that is the object of delivery confirmation. For this reason, it may be difficult to allocate radio communication resources to other communications until delivery confirmation is completed for all of the terminals.
  • the above is not limited to multicast communication, but can also occur in other communication such as frame multiplexing communication in which frames are transmitted to a plurality of destinations.
  • the present disclosure proposes a new and improved communication apparatus and communication method capable of achieving both improvement in communication reliability in which frames are transmitted to a plurality of destinations and effective use of radio communication resources. .
  • the communication unit includes a communication unit that performs frame communication, and the communication unit includes a delivery confirmation request frame for the delivery confirmation response frame including frequency allocation information that specifies a transmission frequency of the delivery confirmation response frame.
  • a communication device is provided for transmitting and receiving the acknowledgment frame that is frequency division multiplexed based on the frequency allocation information.
  • a delivery confirmation request for the delivery confirmation response frame including a communication unit that performs frame communication, the communication unit including frequency allocation information that specifies a transmission frequency of the delivery confirmation response frame
  • a communication device is provided that receives a frame, transmits the acknowledgment frame based on the frequency allocation information, and the acknowledgment frame is frequency division multiplexed.
  • the communication unit that performs frame communication transmits a delivery confirmation request frame for the delivery confirmation response frame including frequency allocation information that specifies a transmission frequency of the delivery confirmation response frame; And receiving the acknowledgment frame frequency-multiplexed based on the frequency allocation information.
  • the communication unit that performs frame communication receives a delivery confirmation request frame for the delivery confirmation response frame including frequency allocation information that specifies a transmission frequency of the delivery confirmation response frame; Transmitting the acknowledgment frame based on the frequency allocation information, wherein the acknowledgment frame is frequency division multiplexed.
  • a communication device and a communication method capable of achieving both improvement in reliability of communication in which frames are transmitted to a plurality of destinations and effective use of radio communication resources.
  • the above effects are not necessarily limited, and any of the effects shown in the present specification, or other effects that can be grasped from the present specification, together with or in place of the above effects. May be played.
  • FIG. 2 is a diagram illustrating a configuration example of a communication system according to an embodiment of the present disclosure.
  • FIG. It is a figure for demonstrating the delivery confirmation in the conventional multicast communication. It is a figure which shows the structural example of the existing BAR frame.
  • 3 is a block diagram illustrating an example of a schematic functional configuration of an AP and an STA according to an embodiment of the present disclosure.
  • FIG. It is a figure for demonstrating the example of allocation of the radio
  • a plurality of constituent elements having substantially the same functional configuration may be distinguished by adding different numbers after the same reference numerals.
  • a plurality of configurations having substantially the same function are distinguished as necessary, such as STA20 # 1 and STA20 # 2.
  • STA20 # 1 and STA20 # 2 are simply referred to as STA20 when it is not necessary to distinguish between them.
  • FIG. 1 is a diagram illustrating a configuration example of a communication system according to an embodiment of the present disclosure.
  • the communication system includes a communication device 10 and a plurality of communication devices 20.
  • the communication device 10 and the communication device 20 have a wireless communication function.
  • the communication device 10 has a multicast communication function for transmitting a frame to one or more communication devices.
  • the communication device 10 operates as an access point (hereinafter also referred to as AP (Access Point)), and the communication device 20 operates as a station (hereinafter also referred to as STA (Station)).
  • AP10 Access Point
  • STA20 station
  • multicast communication from the AP 10 to the plurality of STAs 20 is possible.
  • communication from the AP 10 to the STA 20 is also referred to as DL (downlink)
  • communication from the STA 20 to the AP 10 is also referred to as UL (uplink).
  • the communication system can be composed of an AP 10 and a plurality of STAs 20 # 1 to 20 # 4.
  • the AP 10 and the STAs 20 # 1 to 20 # 4 are connected via wireless communication and directly transmit / receive frames to / from each other.
  • the AP 10 is a communication device compliant with IEEE 802.11, and transmits a multicast frame destined for each of the STAs 20 # 1 to 20 # 4.
  • FIG. 2 is a diagram for explaining delivery confirmation in conventional multicast communication.
  • the wireless communication resource for transmitting the delivery confirmation frame for the multicast frame is allocated in time series for each STA that is the delivery confirmation target. For example, radio communication resources for transmission of BAR # 1 to # 4 frames and BA # 1 to # 4 frames for STAs # 1 to # 4 are allocated in order along the time axis as shown in FIG. It is done.
  • the AP transmits a BAR frame in order of time for each STA. For example, after transmitting the multicast frame, the AP transmits the BARs # 1 to # 4 as shown in FIG. 2 to each of the STAs # 1 to # 4 in time order.
  • each of the STAs transmits a BA frame to the AP when the BAR frame is received.
  • each of the STAs # 1 to # 4 transmits the BA # 1 to # 4 frames as shown in FIG. 2 to the AP when the BARs # 1 to # 4 are received, respectively.
  • wireless communication resources for delivery confirmation are allocated in time series for each STA. For this reason, it may be difficult to allocate wireless communication resources to other communications until delivery confirmation is completed for all STAs.
  • this is not limited to multicast communication, and may occur in communication such as frame multiplex communication in which frames are transmitted to a plurality of destinations.
  • FIG. 3 is a diagram illustrating a configuration example of an existing BAR frame.
  • communication for confirmation of delivery is generally performed using a bandwidth that is substantially the same as the bandwidth used for transmission of the frame that is the subject of delivery confirmation.
  • the BAR frame and the BA frame are transmitted with the same bandwidth as that used for transmitting the multicast frame.
  • the data size for delivery confirmation is often smaller than the data size of the data frame.
  • the BAR frame includes PHY (Physical Layer) Header (PHY header), MAC (Media Access Control) Header (MAC header), BA Control, BA Info, and FCS (Frame Check Sequence). Including.
  • the data size of the BAR frame is at most 152 octets (bytes) as shown in FIG. 3, but the data size of the data frame is usually larger than 152 octets (bytes). Therefore, in such a case, an excessive bandwidth is allocated to the communication for delivery confirmation.
  • the present disclosure proposes a communication device capable of achieving both improvement in reliability of communication in which frames are transmitted to a plurality of destinations and effective use of radio communication resources.
  • the details will be described below.
  • FIG. 1 as an example of the communication system, an example in which the communication system includes the AP 10 and the STA 20 has been described. However, instead of the AP 10, one of the STAs 20 has a plurality of direct links with other STAs 20. It may be a communication device.
  • the above-mentioned DL can be read as “simultaneous transmission from one STA to a plurality of STAs” and the above-mentioned UL can be read as “simultaneous transmission from a plurality of STAs to one STA”.
  • FIG. 4 is a block diagram illustrating an example of a schematic functional configuration of the AP 10 and the STA 20 according to an embodiment of the present disclosure.
  • the AP 10 and the STA 20 include a data processing unit 11, a wireless communication unit 12, a control unit 13, and a storage unit 14.
  • the data processing unit 11 performs processing for data transmission / reception as part of the communication unit. Specifically, the data processing unit 11 generates a frame based on data from a communication upper layer, and provides the generated frame to the wireless communication unit 12. For example, the data processing unit 11 generates a frame (or packet) from the data, and performs processing such as adding a MAC header for media access control (MAC) and adding an error detection code to the generated frame. Further, the data processing unit 11 extracts data from the received frame, and provides the extracted data to a communication upper layer. For example, the data processing unit 11 acquires data by performing analysis of a MAC header, detection and correction of a code error, reorder processing, and the like for a received frame.
  • MAC media access control
  • the wireless communication unit 12 includes a signal processing function and a wireless interface function as a part of the communication unit.
  • the signal processing function is a function that performs signal processing such as modulation on a frame.
  • the wireless communication unit 12 encodes, interleaves, and modulates the frame provided from the data processing unit 11 according to the coding and modulation scheme set by the control unit 13, and adds a preamble and a PHY header. To generate a symbol stream.
  • the radio communication unit 12 acquires a frame by performing demodulation and decoding on the symbol stream obtained by the processing of the radio interface function, and provides the acquired frame to the data processing unit 11 or the control unit 13.
  • the wireless interface function is a function for transmitting and receiving signals via an antenna.
  • the radio communication unit 12 converts a signal related to a symbol stream obtained by processing of the signal processing function into an analog signal, amplifies, filters, and frequency upconverts. And the wireless communication part 12 transmits the signal processed via the antenna.
  • the wireless communication unit 12 performs a process reverse to the signal transmission, such as frequency down-conversion and digital signal conversion, on the signal obtained from the antenna.
  • the control unit 13 controls the operation of the AP 10 or the STA 20 as a whole as a part of the communication unit. Specifically, the control unit 13 performs processing such as information transfer between functions, communication parameter setting, and frame (or packet) scheduling in the data processing unit 11.
  • the storage unit 14 stores information used for processing of the data processing unit 11 or the control unit 13. Specifically, the storage unit 14 stores information stored in the transmission frame, information acquired from the reception frame, information on communication parameters, and the like.
  • the AP 10 transmits a multicast frame to the STA 20.
  • the control unit 13 causes the data processing unit 11 to generate a multicast frame destined for one or a plurality of STAs 20, and the wireless communication unit 12 transmits the generated multicast frame.
  • the multicast frame can be a data frame.
  • the multicast frame may be a control frame or a management frame.
  • the AP 10 determines the STA 20 that is a target for confirming delivery of the multicast frame. Specifically, the control unit 13 determines the number of STAs 20 to be delivery confirmation targets, and selects, from the STAs 20 to be the destinations of the multicast frames, STAs 20 equal to or less than the determined number as delivery confirmation targets.
  • control unit 13 determines the number of STAs 20 to be confirmed for delivery based on the degree of communication congestion. For example, the control unit 13 determines the number of STAs 20 to be confirmed for delivery according to the amount of available wireless communication resources. In addition, the control part 13 may determine the number of STA20 used as delivery confirmation object based on the value determined beforehand. For example, the predetermined value is stored in the storage unit 14.
  • the control unit 13 selects the STA 20 that is the delivery confirmation target from the STA 20 that is the destination of the multicast frame based on the reception characteristics of the STA 20.
  • the reception characteristics of the STA 20 are at least one of a code error rate, an SN ratio (Signal Noise ratio), a communication throughput, and the number of multicast frames successfully received by the STA 20.
  • the control unit 13 preferentially selects the STA 20 having a lower reception characteristic, for example, a lower SN ratio, as a delivery confirmation target. In this case, the reliability of the entire multicast communication can be effectively improved by selecting the STA 20 having lower communication reliability than the other STAs 20 as the delivery confirmation target.
  • the AP 10 determines the number of STAs 20 to be delivery confirmation targets, and selects the STA 20 that is equal to or less than the determined number from the STAs 20 that are the destinations of the multicast frames. For this reason, tightness of radio transmission resources for delivery confirmation due to an increase in the number of STAs 20 that are multicast frame destinations is suppressed. As a result, it is possible to confirm delivery of an efficient multicast frame.
  • FIG. 6 illustrates another example of radio communication resource allocation of the AP 10 according to the present embodiment.
  • the control unit 13 determines the center frequency allocated to each STA 20 selected as the destination of the BAR frame transmitted during the same period, that is, the delivery confirmation target, as a different center frequency for each STA 20. For example, as shown in FIG. 5, radio communication resources are allocated to BA # 1 to # 4 frames in the same period, but the center frequencies of the allocated radio communication resources are different. In addition, the center frequency between the radio
  • wireless communication resources may be allocated with a bias toward a specific band.
  • the band to which wireless communication resources are allocated is congested in such a way. In this case, the communication efficiency in the delivery confirmation response may be reduced.
  • the AP 10 disperses the band used for transmission of the delivery confirmation response frame with respect to the STA 20 selected as the delivery confirmation target. Specifically, the control unit 13 determines the center frequency based on at least one of the identification information about the selected STA 20 and the time information in its own device.
  • identification information is a connection identifier such as AID (Association Identifier)
  • time information is a time stamp (hereinafter also referred to as TSFv) obtained using TSF (Time Synchronization Function) or the like.
  • TSFv time stamp obtained using TSF (Time Synchronization Function) or the like.
  • control part 13 determines a center frequency using following Formula.
  • Ch indicates a channel number, that is, an index indicating the center frequency
  • CH_NUM indicates the number of channels that can be used for delivery confirmation.
  • the center frequency is uniquely specified from Ch. Further, since the TSFv has a fine granularity, it is desirable to use a TSFv that is rounded within a range in which no error occurs between the AP 10 and the STA 20.
  • control unit 13 may determine the assigned center frequency as a center frequency different from the center frequency for the multicast frame. For example, as shown in FIG. 5, the center frequency assigned to the BA # 1 to # 4 frames is different from the center frequency assigned to the multicast frame. Of course, the center frequency of the radio communication resource for delivery confirmation may be the same as the center frequency assigned to the multicast frame.
  • control unit 13 determines the bandwidth allocated for each STA 20 selected as the destination of the BAR frame, that is, the delivery confirmation target, as a different bandwidth among at least a part of each STA 20. Specifically, the control unit 13 determines the bandwidth of the certain STA 20 based on whether or not the center frequency adjacent to the center frequency allocated to a certain STA 20 is allocated to another STA 20.
  • the BAR frame is transmitted with a bandwidth of 20 MHz, that is, one channel. Therefore, when there are two or more available bandwidths, it is possible to transmit the same BAR frame using a bandwidth of two or more channels.
  • the receiving side communication device that is, the STA 20
  • the center frequency adjacent to the center frequency of the BA # 2 frame is not assigned to another STA 20, that is, the delivery confirmation for the other STA 20 is performed using the adjacent center frequency. Therefore, a wider bandwidth than the bandwidth of the BA # 1 frame is assigned to the BA # 2 frame.
  • the same bandwidth may be allocated to each of the STAs 20. For example, as shown in FIG. 5, the same bandwidth is allocated to the BA # 1 to # 4 frames.
  • the bandwidth does not necessarily have to be widened.
  • the center frequency adjacent to the center frequency of the BA # 1 frame is vacant, but the bandwidth of BA # 1 is not widened.
  • control unit 13 determines the bandwidth based on whether or not the adjacent center frequency is assigned to another STA 20 and the reception characteristics of the STA 20.
  • control unit 13 may determine the bandwidth used for transmitting the delivery confirmation response frame in the same period as a bandwidth different from the bandwidth of the multicast frame. For example, as shown in FIG. 6, the total bandwidth allocated to the BA # 1- # 2 frames transmitted in the same period is narrower than the bandwidth allocated to the multicast frame. Further, the total bandwidth allocated to the BA frame may be the same as the bandwidth allocated to the multicast frame, or may be wider than the bandwidth allocated to the multicast frame.
  • control unit 13 may determine the bandwidth allocated to each STA 20 to a bandwidth different from the bandwidth of the multicast frame. For example, as shown in FIG. 5, the bandwidth allocated to BA # 1 to # 4 frames is narrower than the bandwidth allocated to multicast frames.
  • the bandwidth of the wireless communication resource for delivery confirmation may be the same as the bandwidth allocated to the multicast frame or may be wider than the bandwidth allocated to the multicast frame.
  • the AP 10 transmits a delivery confirmation request frame for the delivery confirmation response frame including information specifying the transmission frequency of the delivery confirmation response frame (hereinafter also referred to as frequency allocation information).
  • the control unit 13 causes the data processing unit 11 to generate a BAR frame including frequency allocation information for specifying the transmission frequency of the BA frame for the multicast frame.
  • the wireless communication unit 12 transmits the generated BAR frame.
  • a BAR frame (MBAR: Multi-Channel BAR) for a multicast frame as shown in FIG. 5 is transmitted to each STA 20 belonging to a multicast group (for example, group A) that is the destination of the multicast frame.
  • the MBAR frame according to the present embodiment will be described in detail with reference to FIG.
  • FIG. 7 is a diagram illustrating a configuration example of an MBAR frame transmitted by the AP 10 according to the present embodiment.
  • the MBAR frame includes a PHY header, a MAC header, BAR information (hereinafter also simply referred to as BAR information) and FCS for each STA 20 to be confirmed for delivery.
  • BAR information hereinafter also simply referred to as BAR information
  • FCS FCS for each STA 20 to be confirmed for delivery.
  • the multicast header group ID for the transmitted multicast frame is stored in the RA (Receiver Address) field of the MAC header as the destination information of the MBAR frame.
  • RA Receiveiver Address
  • the BAR information field for each STA 20 subject to delivery confirmation is a field for storing STA ID, BA Control, and frequency allocation information as fields for storing response device information. Includes a field such as Channel Info.
  • the Channel Info field will be explained.
  • the Channel Info field includes fields such as Center Frequency and Channel Width.
  • the primary channel information In the Center Frequency field, information (hereinafter also referred to as primary channel information) that specifies the center frequency of the transmission frequency for the delivery confirmation response frame as frequency allocation information is stored.
  • the primary channel information is information that individually indicates the center frequency determined for each STA 20.
  • the Channel Width field stores information (hereinafter also referred to as bandwidth information) that specifies the bandwidth of the transmission frequency for the delivery confirmation response frame as frequency allocation information.
  • bandwidth information is information indicating individually the bandwidth determined for each STA 20.
  • the Center Frequency field stores information related to a calculation formula for calculating the center frequency.
  • the primary channel information is information indicating the above equation (1), information indicating the TSFv in the equation (1), and information indicating CH_NUM.
  • the primary channel information may be only information indicating TSFv when STA 20 is known for Equation (1) and CH_NUM.
  • the STA 20 calculates the bandwidth of the own device by applying the TSFv included in the AID of the own device and the primary channel information to Equation (1). Thereby, the data amount of the MBAR frame is reduced as compared with the case where the primary channel information for each STA 20 is stored, and the wireless communication resource can be effectively used.
  • the STA 20 transmits a BA frame using any bandwidth between the minimum bandwidth and the maximum bandwidth stored in the bandwidth information.
  • the data amount of the MBAR frame is reduced as compared with the case where the bandwidth information for each STA 20 is stored, and wireless communication resources can be effectively used.
  • only one of the Center Frequency field and the Channel Width field may be a field that stores one piece of information common to the STA 20 that is a delivery confirmation target as described above.
  • the AP 10 receives the delivery confirmation response frame that has been frequency-division multiplexed based on the frequency allocation information.
  • the radio communication unit 12 receives a BA frame that is transmitted at a transmission frequency specified by the frequency allocation information notified to the STA 20 by an MBAR frame and is frequency division multiplexed.
  • the wireless communication unit 12 receives the frequency-division multiplexed BA frame group as a response to the BAR frame, and notifies the center frequency notified to each of the STAs 20 to be acknowledged by the BAR frame.
  • each BA frame of the STA 20 is acquired from the BA frame group based on the bandwidth.
  • the delivery confirmation response frame is received only from the STA 20 specified from the response device information included in the delivery confirmation request frame.
  • the STA 20 receives the multicast frame from the AP 10.
  • the control unit 13 sets the communication frequency of its own device in advance to the center frequency and bandwidth at which the multicast frame is successfully received.
  • the STA 20 receives a delivery confirmation request frame including frequency allocation information from the AP 10.
  • the wireless communication unit 12 receives the MBAR frame from the AP 10 after receiving the multicast frame.
  • the data processing unit 11 acquires the BAR information that matches the STA ID of the own device from the MBAR frame when the own device belongs to the multicast group that is the destination of the MBAR frame. To do.
  • the STA 20 sets the transmission frequency of the own device to the transmission frequency for transmitting the delivery confirmation response frame.
  • the control unit 13 sets the transmission frequency specified from the frequency allocation information included in the BAR information acquired by the data processing unit 11.
  • the control unit 13 sets the transmission frequency of the own device to the center frequency and the bandwidth specified from the primary channel information and the bandwidth information included in the MBAR frame, respectively.
  • the control unit 13 calculates the center frequency and bandwidth based on the primary channel information and the bandwidth information. To do.
  • the STA 20 transmits a delivery confirmation response frame for the received delivery confirmation request frame based on the frequency allocation information included in the delivery confirmation request frame. Specifically, after receiving the MBAR frame, the wireless communication unit 12 transmits the BA frame using the transmission frequency specified from the frequency allocation information included in the MBAR frame. For example, when the received MBAR frame includes BAR information that matches the STA ID of the own apparatus, the control unit 13 causes the data processing unit 11 to generate a BA frame as a response to the MBAR frame. Then, the wireless communication unit 12 transmits the generated BA frame to the AP 10 with the center frequency and bandwidth set based on the frequency allocation information included in the acquired BAR information.
  • the BA frame transmitted from the STA 20 is frequency-division multiplexed as a result, and the frequency-division multiplexed BA frame group is received by the AP 10.
  • FIG. 8 is a flowchart conceptually showing the process of the AP 10 according to this embodiment.
  • AP 10 transmits a multicast frame to each STA 20 (step S102). Specifically, the control unit 13 causes the data processing unit 11 to generate a multicast frame destined for each STA 20. Then, the wireless communication unit 12 transmits the generated multicast frame.
  • the AP 10 transmits a BAR frame to each STA 20 (step S104).
  • the control unit 13 generates an MBAR frame including frequency allocation information for the STA 20 to be confirmed for delivery, which is destined for the multicast group of the multicast frame transmitted to the data processing unit 11.
  • the wireless communication unit 12 transmits the generated MBAR frame.
  • the MBAR frame may be aggregated with the multicast frame.
  • the AP 10 performs reception setting based on the transmission frequency of the BA frame (step S106). Specifically, the control unit 13 sets a reception frequency to the wireless communication unit 12 so that a BA frame transmitted with a center frequency and a bandwidth specified based on the frequency allocation information included in the MBAR frame is received. Let it be set.
  • the AP 10 determines whether a BA frame has been received (step S108). Specifically, after transmitting the MBAR frame, the control unit 13 determines whether a BA frame serving as a response to the MBAR frame has been received from each STA 20 that is a delivery confirmation target. When it is determined that the BA frame has not been received from the STA 20 to be confirmed for delivery, the control unit 13 causes the wireless communication unit 12 to retransmit the BAR frame or the MBAR frame for the unreceived BA frame. If the BA frame is not received within a predetermined time, the process may return to step S102, and the multicast frame or the data frame may be retransmitted for the STA 20 that has not received the BA frame.
  • FIG. 8 is a flowchart conceptually showing the processing of the STA 20 according to this embodiment.
  • the STA 20 receives the multicast frame from the AP 10 (step S202). Specifically, the wireless communication unit 12 receives a multicast frame from the AP 10.
  • the STA 20 receives the BAR frame from the AP 10 (step S204). Specifically, the wireless communication unit 12 receives the MBAR frame after receiving the multicast frame. When the MBAR frame is received, the control unit 13 acquires BAR information that matches the STA ID of the own device when the own device belongs to the multicast group that is the destination of the MBAR frame. If the own device does not belong to the multicast group or if there is no BAR information that matches the STA ID of the own device, the process ends.
  • the STA 20 sets its own transmission frequency to the designated transmission frequency (step S206). Specifically, the control unit 13 sets its own transmission frequency based on primary channel information and bandwidth information included in the BAR information acquired from the received MBAR frame.
  • the STA 20 transmits a BA frame to the AP 10 (step S208).
  • the control unit 13 causes the data processing unit 11 to generate a BA frame that is a response to the MBAR frame.
  • the wireless communication unit 12 transmits the generated BA frame to the AP 10 at the set transmission frequency.
  • the AP 10 transmits a delivery confirmation request frame for a delivery confirmation response frame including frequency allocation information in which a transmission frequency of the delivery confirmation response frame is specified, and the frequency. Based on the allocation information, a frequency-division multiplexed acknowledgment frame is received.
  • the STA 20 receives the delivery confirmation request frame and transmits a delivery confirmation response frame based on the frequency allocation information.
  • the acknowledgment frame is frequency division multiplexed.
  • the delivery confirmation response related to the communication in which frames are transmitted to a plurality of destinations is performed using frequency division multiplexing communication, so that the communication about the delivery confirmation response is performed in time series while improving the reliability of the communication. Compared to the case where the wireless communication resource is performed, the wireless communication resource can be effectively used.
  • the delivery confirmation response frame is transmitted by the STA 20 at the transmission frequency specified from the frequency allocation information. For this reason, the certainty that the delivery confirmation response frame is received by the AP 10 is improved, and the communication efficiency can be improved.
  • the delivery confirmation response frame includes a delivery confirmation response frame for the multicast frame. For this reason, it is possible to effectively use radio communication resources while improving the reliability of multicast communication.
  • the delivery confirmation request frame may be linked to a frame that is a target of delivery confirmation. For this reason, by omitting the waiting time between the transmission of the multicast frame and the transmission of the delivery confirmation request frame, it is possible to shorten the time required for the delivery confirmation, that is, to reduce the radio communication resources used for the delivery confirmation. .
  • the delivery confirmation request frame includes response device information for specifying a communication device for which transmission of a delivery confirmation response frame is requested, and the AP 10 receives a delivery confirmation response from the communication device specified based on the response device information. Receive a frame.
  • the STA 20 is a communication device specified from the response device information, the STA 20 transmits a delivery confirmation response frame. For this reason, the transmission confirmation response frame is transmitted only to a desired communication device, so that the wireless communication resource can be further effectively used.
  • the frequency allocation information includes information for specifying the center frequency of the transmission frequency. For this reason, the center frequency is notified to the STA 20 via the frame, so that the AP 10 can dynamically assign the center frequency, and can perform a delivery confirmation response suitable for the communication environment or the state of the STA 20. Become.
  • the above center frequency differs for each destination of the delivery confirmation request frame transmitted in the same period. For this reason, it is possible to improve the efficiency of communication in the delivery confirmation response by avoiding frame collision or signal interference in the delivery confirmation response performed using the center frequency.
  • the center frequency is specified based on at least one of identification information about the destination of the delivery confirmation request frame and time information in the own device. For this reason, it becomes possible to suppress that the center frequency is biased and allocated to a congested band.
  • the frequency allocation information includes information for specifying the bandwidth of the transmission frequency. For this reason, when the bandwidth is notified to the STA 20 via the frame, the AP 10 can dynamically allocate the bandwidth, and can perform a delivery confirmation response that matches the communication environment or the state of the STA 20. .
  • the above-described bandwidth differs between at least some of the destinations of the delivery confirmation request frame. For this reason, by assigning an appropriate bandwidth to each STA 20, it is possible to effectively use the bandwidth in the delivery confirmation response of the STA 20 and improve the communication efficiency.
  • the above center frequency is different from the center frequency of the frame to be confirmed for delivery.
  • the above-described bandwidth used for transmission of the delivery confirmation response frame in the same period is different from the bandwidth of the frame subjected to the delivery confirmation. For this reason, the freedom degree about the allocation of the radio
  • the delivery confirmation response frame may be time-divided.
  • the delivery confirmation request frame further includes transmission time information for specifying the transmission time (transmission timing) of the delivery confirmation response frame.
  • transmission time information for specifying the transmission time (transmission timing) of the delivery confirmation response frame.
  • a transmission time field in which transmission time information is stored is included in the Channel Info field of the MBAR frame as shown in FIG.
  • the transmission time information may be information indicating a waiting time IFS (Inter Frame Space) from reception of a multicast frame or an MBAR frame, for example, but may be information indicating a transmission time.
  • IFS Inter Frame Space
  • the AP 10 determines whether or not the delivery confirmation response frame is time-shared according to the communication congestion of the delivery confirmation response frame. Specifically, the AP 10 determines the presence / absence of time division based on the available bandwidth and the number of STAs 20 to be confirmed for delivery. For example, when the number of STAs 20 that can be allocated for the available bandwidth is equal to or greater than the number of STAs 20 to be acknowledged, the control unit 13 determines to time-division multiplex the acknowledgment response frame. Note that the presence or absence of time division multiplexing may be determined based on a comparison between the number of STAs 20 to be confirmed for delivery and a predetermined threshold value. In addition, the communication order of the delivery confirmation response frame may be determined in time series, not multiplexing.
  • the AP 10 determines the transmission time information so that the delivery confirmation response frame is time division multiplexed. For example, as shown in FIG. 10, the control unit 13 assigns a transmission period subsequent to the transmission of the MBAR frame for the BA # 1 and # 2 frames, and the BA # 1 and # 2 for the BA # 3 and # 4 frames. Allocates the next transmission period following the frame transmission period. Then, the control unit 13 determines a transmission time so that each of the delivery confirmation response frames is transmitted during the transmission period.
  • the AP 10 transmits a delivery confirmation request frame including frequency allocation information and transmission period information.
  • the data processing unit 11 generates an MBAR frame in which each determined transmission time is stored in the BAR information for each STA 20 to be confirmed for delivery, that is, the transmission time field of the Channel Info field.
  • the generated MBAR frame is transmitted by the wireless communication unit 12. If time division multiplexing is not performed, a delivery confirmation request frame in which transmission time information is not stored in the transmission period field may be transmitted, or a delivery confirmation request frame without a transmission period field is transmitted. May be.
  • the STA 20 that has received the delivery confirmation request frame transmits a delivery confirmation response frame during the transmission period assigned to the own device. For example, when the STAs 20 # 1 and # 2 receive an MBAR, the STAs 20 # 1 and # 2 respectively transmit the BA # 1 and # 2 frames at a timing that is temporally adjacent to the transmission of the MBAR frame as illustrated in FIG. In addition, after the MBAR is received, the STAs 20 # 3 and # 4 transmit the BA # 3 and # 4 frames at a timing that is temporally adjacent to the transmission of the BA # 1 and # 2 frames as illustrated in FIG. To do. As a result, the BA # 1 and # 2 frames and the BA # 3 and # 4 frames are time-division multiplexed.
  • the delivery confirmation request frame further includes transmission time information for specifying the transmission time of the delivery confirmation response frame, and the delivery confirmation response frame includes the transmission time information. Is transmitted at the transmission time specified from the above, and is time-divided. For this reason, it becomes possible to make more STAs 20 subject to delivery confirmation, and it becomes possible to improve the reliability of communication such as multicast communication.
  • the delivery confirmation request frame is time-divided based on the communication congestion level of the delivery confirmation response frame.
  • the number of STAs 20 subject to communication such as multicast communication increases, the number of STAs 20 that are not confirmed for delivery may increase due to a lack of frequency resources for a delivery confirmation response.
  • radio communication resources for an acknowledgment of delivery are additionally secured, and the reliability of multicast communication decreases due to an increase in STA 20 Can be suppressed.
  • the delivery confirmation response frame may be a delivery confirmation response frame for a multiplexed frame.
  • the acknowledgment frame includes an acknowledgment frame for a frame that is frequency division multiplexed or space division multiplexed.
  • FIG. 11 is a diagram for explaining an example of radio communication resource allocation of the AP 10 according to the second modification of the present embodiment.
  • the AP 10 transmits, to the STA 20, a frame group that is space division multiplexed and frequency division multiplexed instead of transmitting the data frame using the multicast method.
  • the AP 10 transmits space-division multiplexed and frequency-division multiplexed data frames DATA # 1 to # 4 as shown in FIG. 11 to each of the STAs 20 # 1 to # 4.
  • the data frames DATA # 1 to # 4 may be subjected only to frequency division multiplexing or only space division multiplexing.
  • the AP 10 transmits a delivery confirmation request frame for the multiplexed frame group to each STA 20 that is a delivery confirmation target.
  • the AP 10 transmits an MBAR including BAR information for each of the data frames DATA # 1 to # 4.
  • the AP 10 transmits an MBAR including BAR information for each of the data frames DATA # 1 to # 4.
  • a group of BAR frames in which the BAR # 1 to # 4 frames for each of the data frames DATA # 1 to # 4 are frequency division multiplexed or space division multiplexed may be transmitted.
  • each of the data frames and each of the corresponding BAR frames may be connected (aggregated).
  • the STA 20 that has received the delivery confirmation request frame transmits a delivery confirmation response frame based on the frequency allocation information included in the delivery confirmation request frame. For example, each of the STAs 20 # 1 to # 4 transmits a BA # 1 to # 4 frame, and the BA # 1 to # 4 frame is frequency division multiplexed. If the STA 20 is compatible with space division multiplexing communication, the BA frame group may be space division multiplexed.
  • the delivery confirmation response frame includes a delivery confirmation response frame for a frame that is frequency division multiplexed or space division multiplexed. For this reason, it is possible to effectively use radio communication resources while improving the reliability of communication in these multiplexed communications.
  • the communication device 20, that is, the STA 20, is a smartphone, a tablet PC (Personal Computer), a notebook PC, a mobile terminal such as a portable game terminal or a digital camera, a fixed terminal such as a television receiver, a printer, a digital scanner, or a network storage, Alternatively, it may be realized as an in-vehicle terminal such as a car navigation device.
  • the STA 20 is a smartphone, a tablet PC (Personal Computer), a notebook PC, a mobile terminal such as a portable game terminal or a digital camera, a fixed terminal such as a television receiver, a printer, a digital scanner, or a network storage
  • it may be realized as an in-vehicle terminal such as a car navigation device.
  • the STA 20 is realized as a terminal (also referred to as an MTC (Machine Type Communication) terminal) that performs M2M (Machine To Machine) communication, such as a smart meter, a vending machine, a remote monitoring device, or a POS (Point Of Sale) terminal. May be. Further, the STA 20 may be a wireless communication module (for example, an integrated circuit module configured by one die) mounted on these terminals.
  • MTC Machine Type Communication
  • M2M Machine To Machine
  • the STA 20 may be a wireless communication module (for example, an integrated circuit module configured by one die) mounted on these terminals.
  • the communication apparatus 10 that is, the AP 10 may be realized as a wireless LAN access point (also referred to as a wireless base station) having a router function or not having a router function.
  • the AP 10 may be realized as a mobile wireless LAN router.
  • the AP 10 may be a wireless communication module (for example, an integrated circuit module configured by one die) mounted on these devices.
  • FIG. 12 is a block diagram illustrating an example of a schematic configuration of a smartphone 900 to which the technology according to the present disclosure can be applied.
  • the smartphone 900 includes a processor 901, a memory 902, a storage 903, an external connection interface 904, a camera 906, a sensor 907, a microphone 908, an input device 909, a display device 910, a speaker 911, a wireless communication interface 913, an antenna switch 914, an antenna 915, A bus 917, a battery 918, and an auxiliary controller 919 are provided.
  • the processor 901 may be, for example, a CPU (Central Processing Unit) or a SoC (System on Chip), and controls the functions of the application layer and other layers of the smartphone 900.
  • the memory 902 includes a RAM (Random Access Memory) and a ROM (Read Only Memory), and stores programs and data executed by the processor 901.
  • the storage 903 can include a storage medium such as a semiconductor memory or a hard disk.
  • the external connection interface 904 is an interface for connecting an external device such as a memory card or a USB (Universal Serial Bus) device to the smartphone 900.
  • the camera 906 includes, for example, an image sensor such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor), and generates a captured image.
  • the sensor 907 may include a sensor group such as a positioning sensor, a gyro sensor, a geomagnetic sensor, and an acceleration sensor.
  • the microphone 908 converts sound input to the smartphone 900 into an audio signal.
  • the input device 909 includes, for example, a touch sensor that detects a touch on the screen of the display device 910, a keypad, a keyboard, a button, or a switch, and receives an operation or information input from a user.
  • the display device 910 has a screen such as a liquid crystal display (LCD) or an organic light emitting diode (OLED) display, and displays an output image of the smartphone 900.
  • the speaker 911 converts an audio signal output from the smartphone 900 into audio.
  • the wireless communication interface 913 supports one or more wireless LAN standards such as IEEE802.11a, 11b, 11g, 11n, 11ac, and 11ad, and performs wireless communication.
  • the wireless communication interface 913 can communicate with other devices via a wireless LAN access point in the infrastructure mode.
  • the wireless communication interface 913 can directly communicate with other devices in an ad hoc mode or a direct communication mode such as Wi-Fi Direct (registered trademark).
  • Wi-Fi Direct unlike the ad hoc mode, one of two terminals operates as an access point, but communication is performed directly between the terminals.
  • the wireless communication interface 913 can typically include a baseband processor, an RF (Radio Frequency) circuit, a power amplifier, and the like.
  • the wireless communication interface 913 may be a one-chip module in which a memory that stores a communication control program, a processor that executes the program, and related circuits are integrated.
  • the wireless communication interface 913 may support other types of wireless communication methods such as a short-range wireless communication method, a proximity wireless communication method, or a cellular communication method in addition to the wireless LAN method.
  • the antenna switch 914 switches the connection destination of the antenna 915 among a plurality of circuits (for example, circuits for different wireless communication schemes) included in the wireless communication interface 913.
  • the antenna 915 includes a single antenna element or a plurality of antenna elements (for example, a plurality of antenna elements constituting a MIMO antenna), and is used for transmission and reception of radio signals by the radio communication interface 913.
  • the smartphone 900 is not limited to the example of FIG. 12, and may include a plurality of antennas (for example, an antenna for a wireless LAN and an antenna for a proximity wireless communication method). In that case, the antenna switch 914 may be omitted from the configuration of the smartphone 900.
  • the bus 917 connects the processor 901, memory 902, storage 903, external connection interface 904, camera 906, sensor 907, microphone 908, input device 909, display device 910, speaker 911, wireless communication interface 913, and auxiliary controller 919 to each other.
  • the battery 918 supplies power to each block of the smartphone 900 illustrated in FIG. 12 through a power supply line partially illustrated by a broken line in the drawing.
  • the auxiliary controller 919 operates the minimum necessary functions of the smartphone 900 in the sleep mode.
  • the data processing unit 11, the wireless communication unit 12, the control unit 13, and the storage unit 14 described with reference to FIG. 4 may be implemented in the wireless communication interface 913.
  • at least a part of these functions may be implemented in the processor 901 or the auxiliary controller 919.
  • the control unit 13 causes the wireless communication unit 12 to set the transmission frequency based on the frequency allocation information included in the received MBAR frame, so that a delivery confirmation response using frequency division multiple access in communication such as multicast communication is performed. Frames can be sent and received. As a result, it is possible to improve both the reliability of communication such as multicast communication and the effective use of wireless communication resources.
  • the smartphone 900 may operate as a wireless access point (software AP) when the processor 901 executes the access point function at the application level. Further, the wireless communication interface 913 may have a wireless access point function.
  • FIG. 13 is a block diagram illustrating an example of a schematic configuration of a car navigation device 920 to which the technology according to the present disclosure can be applied.
  • the car navigation device 920 includes a processor 921, a memory 922, a GPS (Global Positioning System) module 924, a sensor 925, a data interface 926, a content player 927, a storage medium interface 928, an input device 929, a display device 930, a speaker 931, and wireless communication.
  • An interface 933, an antenna switch 934, an antenna 935, and a battery 938 are provided.
  • the processor 921 may be a CPU or SoC, for example, and controls the navigation function and other functions of the car navigation device 920.
  • the memory 922 includes RAM and ROM, and stores programs and data executed by the processor 921.
  • the GPS module 924 measures the position (for example, latitude, longitude, and altitude) of the car navigation device 920 using GPS signals received from GPS satellites.
  • the sensor 925 may include a sensor group such as a gyro sensor, a geomagnetic sensor, and an atmospheric pressure sensor.
  • the data interface 926 is connected to the in-vehicle network 941 through a terminal (not shown), for example, and acquires data generated on the vehicle side such as vehicle speed data.
  • the content player 927 reproduces content stored in a storage medium (for example, CD or DVD) inserted into the storage medium interface 928.
  • the input device 929 includes, for example, a touch sensor, a button, or a switch that detects a touch on the screen of the display device 930, and receives an operation or information input from the user.
  • the display device 930 has a screen such as an LCD or an OLED display, and displays a navigation function or an image of content to be reproduced.
  • the speaker 931 outputs the navigation function or the audio of the content to be played back.
  • the wireless communication interface 933 supports one or more wireless LAN standards such as IEEE802.11a, 11b, 11g, 11n, 11ac, and 11ad, and executes wireless communication.
  • the wireless communication interface 933 can communicate with other devices via a wireless LAN access point in the infrastructure mode.
  • the wireless communication interface 933 can directly communicate with other devices in an ad hoc mode or a direct communication mode such as Wi-Fi Direct.
  • the wireless communication interface 933 may typically include a baseband processor, an RF circuit, a power amplifier, and the like.
  • the wireless communication interface 933 may be a one-chip module in which a memory that stores a communication control program, a processor that executes the program, and related circuits are integrated.
  • the wireless communication interface 933 may support other types of wireless communication systems such as a short-range wireless communication system, a proximity wireless communication system, or a cellular communication system.
  • the antenna switch 934 switches the connection destination of the antenna 935 among a plurality of circuits included in the wireless communication interface 933.
  • the antenna 935 includes a single antenna element or a plurality of antenna elements, and is used for transmission and reception of a radio signal by the radio communication interface 933.
  • the car navigation device 920 is not limited to the example of FIG. 13 and may include a plurality of antennas. In that case, the antenna switch 934 may be omitted from the configuration of the car navigation device 920.
  • the battery 938 supplies power to each block of the car navigation apparatus 920 shown in FIG. 13 through a power supply line partially shown by broken lines in the drawing. Further, the battery 938 stores electric power supplied from the vehicle side.
  • the data processing unit 11, the wireless communication unit 12, the control unit 13, and the storage unit 14 described with reference to FIG. 4 may be implemented in the wireless communication interface 933. Further, at least a part of these functions may be implemented in the processor 921.
  • the control unit 13 causes the wireless communication unit 12 to set the transmission frequency based on the frequency allocation information included in the received MBAR frame, so that a delivery confirmation response using frequency division multiple access in communication such as multicast communication is performed. Frames can be sent and received. As a result, it is possible to improve both the reliability of communication such as multicast communication and the effective use of wireless communication resources.
  • the wireless communication interface 933 may operate as the above-described AP 10 and provide a wireless connection to a terminal of a user who gets on the vehicle.
  • the control unit 13 transmits and receives an MBAR frame via the data processing unit 11 and the wireless communication unit 12, thereby transmitting and receiving a delivery confirmation response frame using frequency division multiple access in communication such as multicast communication. It becomes possible. As a result, it is possible to improve both the reliability of communication such as multicast communication and the effective use of wireless communication resources.
  • the technology according to the present disclosure may be realized as an in-vehicle system (or vehicle) 940 including one or more blocks of the car navigation device 920 described above, an in-vehicle network 941, and a vehicle side module 942.
  • vehicle-side module 942 generates vehicle-side data such as vehicle speed, engine speed, or failure information, and outputs the generated data to the in-vehicle network 941.
  • FIG. 14 is a block diagram illustrating an example of a schematic configuration of a wireless access point 950 to which the technology according to the present disclosure can be applied.
  • the wireless access point 950 includes a controller 951, a memory 952, an input device 954, a display device 955, a network interface 957, a wireless communication interface 963, an antenna switch 964, and an antenna 965.
  • the controller 951 may be a CPU or a DSP (Digital Signal Processor), for example, and various functions (for example, access restriction, routing, encryption, firewall) of the IP (Internet Protocol) layer and higher layers of the wireless access point 950 And log management).
  • the memory 952 includes a RAM and a ROM, and stores programs executed by the controller 951 and various control data (for example, a terminal list, a routing table, an encryption key, security settings, and a log).
  • the input device 954 includes, for example, a button or a switch and receives an operation from the user.
  • the display device 955 includes an LED lamp and the like, and displays the operation status of the wireless access point 950.
  • the network interface 957 is a wired communication interface for connecting the wireless access point 950 to the wired communication network 958.
  • the network interface 957 may have a plurality of connection terminals.
  • the wired communication network 958 may be a LAN such as Ethernet (registered trademark), or may be a WAN (Wide Area Network).
  • the wireless communication interface 963 supports one or more of wireless LAN standards such as IEEE802.11a, 11b, 11g, 11n, 11ac, and 11ad, and provides a wireless connection as an access point to nearby terminals.
  • the wireless communication interface 963 may typically include a baseband processor, an RF circuit, a power amplifier, and the like.
  • the wireless communication interface 963 may be a one-chip module in which a memory that stores a communication control program, a processor that executes the program, and related circuits are integrated.
  • the antenna switch 964 switches the connection destination of the antenna 965 among a plurality of circuits included in the wireless communication interface 963.
  • the antenna 965 includes a single antenna element or a plurality of antenna elements, and is used for transmission and reception of a radio signal by the radio communication interface 963.
  • the data processing unit 11, the wireless communication unit 12, the control unit 13, and the storage unit 14 described with reference to FIG. 4 may be implemented in the wireless communication interface 963.
  • at least a part of these functions may be implemented in the controller 951.
  • the control unit 13 transmits an MBAR frame for a multicast frame or the like via the data processing unit 11 and the wireless communication unit 12, so that a delivery confirmation response frame using frequency division multiple access in communication such as multicast communication is transmitted. Transmission and reception are possible. As a result, it is possible to improve both the reliability of communication such as multicast communication and the effective use of wireless communication resources.
  • a delivery confirmation response related to communication in which frames are transmitted to a plurality of destinations is performed using frequency division multiplex communication, thereby improving the reliability of the communication, Wireless communication resources can be effectively used compared to a case where communication regarding a delivery confirmation response is performed in time series.
  • both the primary channel information and the bandwidth information are included in the delivery confirmation request frame, that is, the BAR information, but the present technology is not limited to such an example.
  • only the primary channel information may be included in the delivery confirmation request frame.
  • the bandwidth allocated to the STA 20 is known to the STA 20
  • only the Center Frequency field is provided in the Channel Info of the MBAR frame, and only the primary channel information is stored.
  • the communication amount is reduced, and the wireless communication resource can be effectively used.
  • the center frequency assigned to the STA 20 is known to the STA 20
  • only the bandwidth information may be included in the BAR information.
  • a delivery confirmation request frame that does not include the transmission time information may be transmitted.
  • both the center frequency and the bandwidth are known to the STA 20
  • only the transmission time may be included in the BAR information.
  • the primary channel information is information indicating the center frequency or information about the calculation formula, but the primary channel information may be information indicating the channel number.
  • the STA 20 specifies the center frequency from the channel number indicated by the primary channel information.
  • the BAR information field of the delivery confirmation request frame is included in the portion corresponding to the payload.
  • the BAR information field may be included in the PHY header or the MAC header.
  • the delivery confirmation request frame is transmitted by the multicast method or the frame multiplexing method.
  • the delivery confirmation request frame is a frame in which the BAR frames addressed to each STA 20 to be acknowledged are aggregated. May be sent as
  • the acknowledgment response frame or the acknowledgment request frame is frequency division multiplexed or space division multiplexed.
  • other frames are frequency division multiplexed or space division multiplexed.
  • frequency division multiplexing or space division multiplexing may be performed using a frequency or spatial stream in which a BAR frame group and a data frame are free as shown in FIG.
  • the bandwidth used for communication is 80 MHz or 40 MHz in FIGS. 5, 6, 10, and 11 has been described, but the bandwidth may be larger or smaller. Good.
  • the communication unit transmits a delivery confirmation request frame for the delivery confirmation response frame including frequency allocation information in which a transmission frequency of the delivery confirmation response frame is specified; A communication device that receives the acknowledgment frame that has been frequency division multiplexed based on the frequency allocation information.
  • the delivery confirmation response frame includes a delivery confirmation response frame for a multicast frame.
  • the delivery confirmation response frame includes a delivery confirmation response frame for a frame that is frequency division multiplexed or space division multiplexed.
  • the communication device according to any one of (1) to (4), wherein the delivery confirmation request frame is connected to a frame that is a target of delivery confirmation.
  • the delivery confirmation request frame further includes transmission time information for specifying a transmission time of the delivery confirmation response frame, The communication device according to any one of (1) to (5), wherein the communication unit receives the delivery confirmation response frame that is time-divided based on the transmission time information.
  • the delivery confirmation request frame includes response device information for specifying the communication device for which transmission of the delivery confirmation response frame is requested, The communication device according to any one of (1) to (6), wherein the communication unit receives the delivery confirmation response frame from the communication device specified based on the response device information.
  • the frequency allocation information includes information for specifying a center frequency of the transmission frequency.
  • the center frequency is different for each destination of the delivery confirmation request frame transmitted in the same period.
  • the center frequency is specified based on at least one of identification information about a destination of the delivery confirmation request frame and time information in the own device.
  • the center frequency is different from a center frequency of a frame that is a target of delivery confirmation.
  • the frequency allocation information includes information for specifying a bandwidth of the transmission frequency.
  • the communication device wherein the bandwidth differs between at least a part of destinations of the delivery confirmation request frame.
  • the communication device (14) The communication device according to (12) or (13), wherein the bandwidth used for transmitting the delivery confirmation request frame in the same period is different from a bandwidth of a frame to be a delivery confirmation target.
  • It has a communication unit that performs frame communication, The communication unit receives a delivery confirmation request frame for the delivery confirmation response frame including frequency allocation information in which a transmission frequency of the delivery confirmation response frame is specified; Transmitting the acknowledgment frame based on the frequency allocation information; The communication apparatus, wherein the delivery confirmation response frame is frequency division multiplexed.
  • the communication device transmits the delivery confirmation response frame at a transmission frequency specified from the frequency allocation information.
  • the delivery confirmation request frame further includes transmission time information for specifying a transmission time of the delivery confirmation response frame, The communication unit transmits the delivery confirmation response frame at a transmission time specified from the transmission time information, The communication device according to (15) or (16), wherein the delivery confirmation response frame is time-divided.
  • the delivery confirmation request frame includes response device information for specifying the communication device for which transmission of the delivery confirmation response frame is requested, The communication device according to any one of (15) to (17), wherein the communication unit transmits the delivery confirmation response frame when the own device is the communication device specified from the response device information. .

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Multimedia (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Small-Scale Networks (AREA)

Abstract

L'invention vise à fournir un dispositif de communication et un procédé de communication aptes à la fois à améliorer la fiabilité d'une communication dans laquelle des trames sont transmises à une pluralité de destinations et à permettre une utilisation efficace de ressources de communication sans fil. Un dispositif de communication selon l'invention comprend une unité de communication qui communique des trames. L'unité de communication : transmet une trame de demande de confirmation de distribution pour une trame de réponse de confirmation de distribution, ladite trame de demande contenant des informations d'attribution de fréquence dans lesquelles la fréquence de transmission de la trame de réponse de confirmation de distribution est spécifiée ; et reçoit, sur la base des informations d'attribution de fréquence, la trame de réponse de confirmation de distribution qui a été soumise à un multiplexage par répartition en fréquence.
PCT/JP2016/062163 2015-07-07 2016-04-15 Dispositif de communication, et procédé de communication WO2017006607A1 (fr)

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EP22213712.7A EP4171111B1 (fr) 2015-07-07 2016-04-15 Dispositif de communication et procédé de communication
US15/568,860 US10361876B2 (en) 2015-07-07 2016-04-15 Communication device and communication method
CN201680038557.1A CN107710814B (zh) 2015-07-07 2016-04-15 通信设备和通信方法
CN202110971491.4A CN113676307B (zh) 2015-07-07 2016-04-15 通信设备和通信方法
EP20211056.5A EP3806533B1 (fr) 2015-07-07 2016-04-15 Dispositif et procédé de communication
EP16821078.9A EP3322216B1 (fr) 2015-07-07 2016-04-15 Dispositif de communication, et procédé de communication
KR1020177035577A KR102554560B1 (ko) 2015-07-07 2016-04-15 통신 장치 및 통신 방법
MYPI2017704233A MY182873A (en) 2015-07-07 2016-04-15 Communication device and communication method
EP24171336.1A EP4412159A3 (fr) 2015-07-07 2016-04-15 Dispositif de communication et procédé de communication
JP2017527100A JP6834954B2 (ja) 2015-07-07 2016-04-15 通信装置および通信方法
CA2985322A CA2985322C (fr) 2015-07-07 2016-04-15 Dispositif de communication et methode de communication pour effectuer une communication de trames
CN202110971940.5A CN113676308B (zh) 2015-07-07 2016-04-15 通信设备和通信方法
PH12018500032A PH12018500032A1 (en) 2015-07-07 2018-01-03 Communication device and communication method
US16/429,164 US10887121B2 (en) 2015-07-07 2019-06-03 Communication device and communication method
US17/137,378 US11362850B2 (en) 2015-07-07 2020-12-30 Communication device and communication method
US17/752,882 US11799681B2 (en) 2015-07-07 2022-05-25 Communication device and communication method
US18/198,847 US12068878B2 (en) 2015-07-07 2023-05-18 Communication device and communication method
US18/766,719 US20240364557A1 (en) 2015-07-07 2024-07-09 Communication device and communication method

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US20230291596A1 (en) 2023-09-14
US11362850B2 (en) 2022-06-14
CN113676307B (zh) 2024-07-09
JP6834954B2 (ja) 2021-02-24
CA2985322A1 (fr) 2017-01-12
US10887121B2 (en) 2021-01-05
EP3322216B1 (fr) 2020-12-02
US20240364557A1 (en) 2024-10-31
KR102554560B1 (ko) 2023-07-13
EP4412159A3 (fr) 2024-11-13
US20180115433A1 (en) 2018-04-26
US11799681B2 (en) 2023-10-24
EP3806533B1 (fr) 2023-01-04
CN113676308A (zh) 2021-11-19
EP3322216A4 (fr) 2019-02-27
US20210119818A1 (en) 2021-04-22
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US10361876B2 (en) 2019-07-23
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CA2985322C (fr) 2023-08-22
CN107710814A (zh) 2018-02-16
CN113676307A (zh) 2021-11-19
EP4412159A2 (fr) 2024-08-07
US12068878B2 (en) 2024-08-20
CN107710814B (zh) 2021-09-10
EP3322216A1 (fr) 2018-05-16
EP4171111B1 (fr) 2024-06-12
EP4171111A1 (fr) 2023-04-26
KR20180027426A (ko) 2018-03-14
US20190288864A1 (en) 2019-09-19
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MY182873A (en) 2021-02-05

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